[Objectives]To optimize the ultrasonic-assisted extraction process of polysaccharides from Cyathula Capitata( Wall.) Moq. and evaluate its antioxidant capacity in vitro. [Methods] The single factor orthogonal design w...[Objectives]To optimize the ultrasonic-assisted extraction process of polysaccharides from Cyathula Capitata( Wall.) Moq. and evaluate its antioxidant capacity in vitro. [Methods] The single factor orthogonal design was applied to explore the effects of ultrasonic time,solid-to-liquid ratio,extraction time and ethanol precipitation concentration on the extraction rate of crude polysaccharides from C. Capitata,to obtain the optimal extraction process; DPPH and ABTS^+ free radical scavenging ability was detected to evaluate its in vitro antioxidant activity.[Results]The optimal extraction process of C. Capitata crude polysaccharide was as follows: solid-to-liquid ratio was 40∶ 1,the extraction temperature was 50℃,the ultrasonic time was 80 min. Under such conditions,the extraction rate of C. Capitata crude polysaccharide was 10. 51%,and the purity was 56. 9%; C. Capitata crude polysaccharide has good scavenging ability to DPPH and ABTS^+ free radicals,and its IC_(50) values are 0. 468 and 0. 231 mg/mL,respectively. [Conclusions]The optimized process is simple and feasible,and the C. Capitata polysaccharide has good antioxidant activity in vitro. This experiment provides a basis for the further development and utilization of the C. Capitata polysaccharide.展开更多
目的建立超高效液相色谱-四极杆飞行时间质谱联用技术(ultra performance liquid chromatography quadrupole time of flight mass spectrometry,UPLC-Q-TOF-MS/MS)结合多元统计分析技术的分析方法,比较不同品种牛膝的化学成分差异。方...目的建立超高效液相色谱-四极杆飞行时间质谱联用技术(ultra performance liquid chromatography quadrupole time of flight mass spectrometry,UPLC-Q-TOF-MS/MS)结合多元统计分析技术的分析方法,比较不同品种牛膝的化学成分差异。方法基于UPLC-Q-TOF-MS/MS技术对怀牛膝Achyranthes bidentata、川牛膝Cyathula officinalis、红牛膝Cyathula capitata和土牛膝Achyranthes aspera的化学成分进行分析与鉴别,并运用多元统计分析筛选不同品种牛膝的差异性成分。结果共初步指认出230种化学成分,其中皂苷类81种、生物碱类26种、甾酮类12种、有机酸类75种、木脂素类19种和黄酮类17种。根据变量重要性投影(variable importance in projection,VIP)值>1,t检验(P<0.05)从4种牛膝中共筛选出25个化学标志物。其中,竹节参皂苷、牛膝皂苷在怀牛膝中占比居多;竹节参皂苷IVa在红牛膝中的占比最高;甾醇、黄酮醇、有机酸和糖苷类成分在川牛膝中的占比最高;齐墩果烷型皂苷和酪胺类生物碱类成分则在安徽土牛膝中占比最多。结论该方法快速、全面地对牛膝植物资源的成分进行系统分析,为牛膝的品种分类鉴别和资源开发利用提供了基础。展开更多
目的:对川牛膝和伪品头花杯苋、杂牛膝及其掺伪品进行快速鉴别。方法:采用性状特征结合泡沫试验对川牛膝、伪品、掺伪品进行鉴别,其中性状特征方面,对形状、大小、质地、色泽、气、味6个方面进行观察及鼻嗅口尝,泡沫试验方面,以产生的...目的:对川牛膝和伪品头花杯苋、杂牛膝及其掺伪品进行快速鉴别。方法:采用性状特征结合泡沫试验对川牛膝、伪品、掺伪品进行鉴别,其中性状特征方面,对形状、大小、质地、色泽、气、味6个方面进行观察及鼻嗅口尝,泡沫试验方面,以产生的泡沫体积为判断指标,对取样量、加水量、振摇时间、粉末粒度、水温、重复性、掺伪比例及其稳定性8个方面进行考察和验证。结果:性状特征方面,川牛膝及其伪品头花杯苋、杂牛膝在形状、大小、色泽、质地、气、味上均表现出较为明显的差异,尤其是伪品存有色红、味苦麻的专属性鉴别要点。泡沫试验方面,优选的泡沫试验参数为,称取待测样品粉末(过3号筛)0. 3 g,置具塞刻度试管中,加水10 m L,密闭,用力上下振摇1 min,静置5 min,所得方法能鉴别出川牛膝、伪品和掺伪5%以上的掺伪品。川牛膝、伪品和不同比例的掺伪品产生的泡沫体积在5～30 min内无变化,9 h内略有下降,但幅度很小,且掺伪比例越高,产生泡沫的体积越大且稳定性越好。对8批川牛膝和8批伪品验证得出,川牛膝产生泡沫体积均<2 m L,伪品均>13 m L,5%掺伪品均> 5 m L,表现出统计学差异。综合性状特征结合泡沫试验,得出川牛膝真伪及掺伪的5个专属性鉴别要点。结论:通过5个专属性鉴别要点,性状特征结合泡沫试验能有效的将川牛膝和伪品头花杯苋、杂牛膝及其掺伪品鉴别区分,且具有准确、简易、时耗短、可行性强等特点,为川牛膝真伪及掺伪鉴别提供新的方法和参考依据。展开更多
基金Supported by Open Fund Project of Key Laboratory of Higher Education in Sichuan Province in 2017 for Development of Characteristic Biological Resources in Dry and Hot Valley(GR-2017-C-01)
文摘[Objectives]To optimize the ultrasonic-assisted extraction process of polysaccharides from Cyathula Capitata( Wall.) Moq. and evaluate its antioxidant capacity in vitro. [Methods] The single factor orthogonal design was applied to explore the effects of ultrasonic time,solid-to-liquid ratio,extraction time and ethanol precipitation concentration on the extraction rate of crude polysaccharides from C. Capitata,to obtain the optimal extraction process; DPPH and ABTS^+ free radical scavenging ability was detected to evaluate its in vitro antioxidant activity.[Results]The optimal extraction process of C. Capitata crude polysaccharide was as follows: solid-to-liquid ratio was 40∶ 1,the extraction temperature was 50℃,the ultrasonic time was 80 min. Under such conditions,the extraction rate of C. Capitata crude polysaccharide was 10. 51%,and the purity was 56. 9%; C. Capitata crude polysaccharide has good scavenging ability to DPPH and ABTS^+ free radicals,and its IC_(50) values are 0. 468 and 0. 231 mg/mL,respectively. [Conclusions]The optimized process is simple and feasible,and the C. Capitata polysaccharide has good antioxidant activity in vitro. This experiment provides a basis for the further development and utilization of the C. Capitata polysaccharide.
文摘目的建立超高效液相色谱-四极杆飞行时间质谱联用技术(ultra performance liquid chromatography quadrupole time of flight mass spectrometry,UPLC-Q-TOF-MS/MS)结合多元统计分析技术的分析方法,比较不同品种牛膝的化学成分差异。方法基于UPLC-Q-TOF-MS/MS技术对怀牛膝Achyranthes bidentata、川牛膝Cyathula officinalis、红牛膝Cyathula capitata和土牛膝Achyranthes aspera的化学成分进行分析与鉴别,并运用多元统计分析筛选不同品种牛膝的差异性成分。结果共初步指认出230种化学成分,其中皂苷类81种、生物碱类26种、甾酮类12种、有机酸类75种、木脂素类19种和黄酮类17种。根据变量重要性投影(variable importance in projection,VIP)值>1,t检验(P<0.05)从4种牛膝中共筛选出25个化学标志物。其中,竹节参皂苷、牛膝皂苷在怀牛膝中占比居多;竹节参皂苷IVa在红牛膝中的占比最高;甾醇、黄酮醇、有机酸和糖苷类成分在川牛膝中的占比最高;齐墩果烷型皂苷和酪胺类生物碱类成分则在安徽土牛膝中占比最多。结论该方法快速、全面地对牛膝植物资源的成分进行系统分析,为牛膝的品种分类鉴别和资源开发利用提供了基础。
文摘目的:对川牛膝和伪品头花杯苋、杂牛膝及其掺伪品进行快速鉴别。方法:采用性状特征结合泡沫试验对川牛膝、伪品、掺伪品进行鉴别,其中性状特征方面,对形状、大小、质地、色泽、气、味6个方面进行观察及鼻嗅口尝,泡沫试验方面,以产生的泡沫体积为判断指标,对取样量、加水量、振摇时间、粉末粒度、水温、重复性、掺伪比例及其稳定性8个方面进行考察和验证。结果:性状特征方面,川牛膝及其伪品头花杯苋、杂牛膝在形状、大小、色泽、质地、气、味上均表现出较为明显的差异,尤其是伪品存有色红、味苦麻的专属性鉴别要点。泡沫试验方面,优选的泡沫试验参数为,称取待测样品粉末(过3号筛)0. 3 g,置具塞刻度试管中,加水10 m L,密闭,用力上下振摇1 min,静置5 min,所得方法能鉴别出川牛膝、伪品和掺伪5%以上的掺伪品。川牛膝、伪品和不同比例的掺伪品产生的泡沫体积在5～30 min内无变化,9 h内略有下降,但幅度很小,且掺伪比例越高,产生泡沫的体积越大且稳定性越好。对8批川牛膝和8批伪品验证得出,川牛膝产生泡沫体积均<2 m L,伪品均>13 m L,5%掺伪品均> 5 m L,表现出统计学差异。综合性状特征结合泡沫试验,得出川牛膝真伪及掺伪的5个专属性鉴别要点。结论:通过5个专属性鉴别要点,性状特征结合泡沫试验能有效的将川牛膝和伪品头花杯苋、杂牛膝及其掺伪品鉴别区分,且具有准确、简易、时耗短、可行性强等特点,为川牛膝真伪及掺伪鉴别提供新的方法和参考依据。
